/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.apache.skywalking.apm.plugin.grpc.v1.client;

import static org.apache.skywalking.apm.plugin.grpc.v1.Constants.GENERIC_CALL_METHOD;

import java.lang.reflect.Method;

import org.apache.skywalking.apm.agent.core.context.ContextManager;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.MethodInterceptResult;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.StaticMethodsAroundInterceptor;

/**
 * Trace calling services without grpc stubs.
 * This type of request is characterized by the parameter DynamicMessage
 */
public class ClientCallsGenericCallInterceptor implements StaticMethodsAroundInterceptor {

    @Override
    public void beforeMethod(Class clazz, Method method, Object[] allArguments, Class<?>[] parameterTypes,
            MethodInterceptResult result) {
        // only trace async generic call. Determine if the request parameter is a DynamicMessage
        if (allArguments[1] instanceof com.google.protobuf.DynamicMessage) {
            ContextManager.getRuntimeContext().put(GENERIC_CALL_METHOD, method.getName());
        }
    }

    @Override
    public Object afterMethod(Class clazz, Method method, Object[] allArguments, Class<?>[] parameterTypes,
            Object ret) {
        return ret;
    }

    @Override
    public void handleMethodException(Class clazz, Method method, Object[] allArguments, Class<?>[] parameterTypes,
            Throwable t) {
    }

}
